The strongest choice for most plastic repairs is usually a 2-part epoxy made for plastic , because it bonds well, fills gaps, and cures into a very durable joint. If you need a fast bond on small, tight-fitting parts , a cyanoacrylate “super glue” formulated for plastic can be strong, but it is typically more brittle than epoxy.

Best pick by plastic type

Plastic situation| Best adhesive| Why
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Most hard plastics, cracked parts, structural repairs| 2-part epoxy for plastic| Strong, gap-filling, impact and moisture resistant after full cure 71
Small parts, clean break, fast fix| Plastic super glue| Very quick and strong on close-fitting joints, but less flexible 21
PVC, ABS, model kits| Plastic cement / solvent cement| Can chemically fuse compatible plastics for a very strong bond 18
Flexible plastics| Flexible plastic adhesive| Better than brittle glues for bendy materials 8

Practical advice

  • For the strongest all-around fix: use Loctite Epoxy Plastic or a similar 2-part plastic epoxy.
  • For ABS or similar rigid plastic cracks: a plastic epoxy is usually the safest strong option.
  • For polystyrene model kits: plastic cement often gives the best bond because it actually welds the parts together.
  • Avoid guessing the glue before checking the plastic type , because some plastics resist many adhesives.

Quick rule

If you want one answer: use a 2-part epoxy designed for plastic for the strongest general-purpose repair.

If you want, I can also tell you the best glue for your exact plastic type like ABS, PVC, PP, PE, or acrylic.